1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58using 6,35 mm magnetic tape Format D-7 Part 1: VTR specificationsThe European Standard EN 62071-1:2
2、006 has the status of a British StandardICS 33.160.40Helical-scan compressed digital video cassette system BRITISH STANDARDBS EN 62071-1:2006BS EN 62071-1:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October 2006 BSI 2006ISBN 0 580
3、49477 2Amendments issued since publicationAmd. No. Date Commentsits secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Na
4、tional forewordThis British Standard was published by BSI. It is the UK implementation of EN 62071-1:2006. It is identical with IEC 62071-1:2005. This standard, together with BS EN 62071-2:2006 and BS EN 62071-3:2006 supersedes BS EN 62071:2001, which will be withdrawn on 1 June 2009.The UK particip
5、ation in its preparation was entrusted to Technical Committee EPL/100, Audio, video and multimedia systems and equipment.A list of organizations represented on EPL/100 can be obtained on request to EUROPEAN STANDARD EN 62071-1 NORME EUROPENNE EUROPISCHE NORM July 2006 CENELEC European Committee for
6、Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
7、Ref. No. EN 62071-1:2006 E ICS 33.160.40 English version Helical-scan compressed digital video cassette system using 6,35 mm magnetic tape - Format D-7 Part 1: VTR specifications (IEC 62071-1:2005) Systme de magntoscope numrique cassette balayage hlicodal signal compress utilisant une bande magntiqu
8、e de 6,35 mm - Format D-7 Partie 1: Spcifications VTR (CEI 62071-1:2005) Videokassettensystem mit komprimierter digitaler Schrgspuraufzeichnung auf Magnetband 6,35 mm - Format D-7 Teil 1: VTR-Festlegungen (IEC 62071-1:2005) This European Standard was approved by CENELEC on 2006-06-01. CENELEC member
9、s are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application
10、 to the Central Secretariat or to any CENELEC member. This European Standard exists in two official versions (English and German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the sa
11、me status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Polan
12、d, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Foreword The text of the International Standard IEC 62071-1:2005, prepared by IEC TC 100, Audio, video and multimedia systems and equipment, was submitted to the formal vote and was approved by CENELEC as EN
13、 62071-1 on 2006-06-01 without any modification. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2007-06-01 latest date by which the national standards conflicting with the EN
14、 have to be withdrawn (dow) 2009-06-01 _ Endorsement notice The text of the International Standard IEC 62071-1:2005 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: _
15、2 EN 62071-1:2006CONTENTS 1 Scope.7 2 Normative references7 3 Abbreviations and acronyms .7 4 Environment and test conditions .8 4.1 Environment 8 4.2 Reference tape9 4.3 Calibration tapes .9 5 Tape.9 5.1 Base9 5.2 Width 9 5.3 Width fluctuation9 5.4 Reference edge straightness .9 5.5 Tape thickness
16、10 5.6 Transmissivity .10 5.7 Offset yield strength.10 5.8 Magnetic coating .10 5.9 Coating coercivity 10 6 Helical recordings .10 6.1 Tape speed .10 6.2 Sectors10 6.3 Record locations and dimensions.10 6.4 Helical track record tolerance zones 11 6.5 Relative positions of recorded information11 6.6
17、Gap azimuth 21 7 Programme track data 25 7.1 General .25 7.2 Insert and track information (ITI) sector .40 7.3 Audio sector 50 7.4 Video sector 55 7.5 Subcode sector59 7.6 Edit gap.62 8 Audio processing 63 8.1 General .63 8.2 Encoding mode63 8.3 Audio shuffling.64 8.4 Audio auxiliary data (AAUX).65
18、8.5 Error correction code addition 68 9 Video processing 70 9.1 General .70 9.2 Compressed macro block and data-sync block.70 9.3 Video auxiliary data (VAUX).71 9.4 Error correction code addition 75 3 EN 62071-1:200610 Subcode processing .76 10.1 General .76 10.2 Subcode data 76 10.3 Error correctio
19、n code addition 79 11 Longitudinal tracks80 11.1 Control track80 11.2 Cue track.81 Annex A (normative) Tape tension82 Annex B (normative) Track pattern during insert editing83 Annex C (normative) Cross-tape track measurement technique 85 Annex D (normative) Frequency characteristics of F0track .88 A
20、nnex E (informative) Relationship between tape length and recording time .89 Annex F (informative) Block diagram of D-7 recorder90 Bibliography91 Figure 1 Locations and dimensions of recorded tracks of 25 Mb/s format12 Figure 2 Locations and dimensions of recorded tracks of 50 Mb/s format13 Figure 3
21、 Location of cue and control track record14 Figure 4 Locations and dimensions of tolerance zones of helical track record of 25 Mb/s format19 Figure 5 Locations and dimensions of tolerance zones of helical track record of 50 Mb/s format20 Figure 6 A possible scanner configuration and tape wrap of 25
22、Mb/s format23 Figure 7 A possible scanner configuration and tape wrap of 50 Mb/s format24 Figure 8 Possible recording system configuration with digital interface port (informative) .26 Figure 9 Sector arrangement on helical track26 Figure 10 Frames and tracks (525/60 system of 25 Mb/s format) 27 Fig
23、ure 11 Frames and tracks (625/50 system of 25 Mb/s format) 27 Figure 12 A frame and tracks (525/60 system of 50 Mb/s format)28 Figure 13 A frame and tracks (625/50 system of 50 Mb/s format)28 Figure 14 Frequency characteristics of tracks.33 Figure 15 Modulation for audio sector.35 Figure 16 Modulati
24、on for video sector .36 Figure 17 Modulation for subcode sector 37 Figure 18 Possible block diagram for signal processing 38 Figure 19 Bit stream before interleaved NRZI modulation39 Figure 20 Pre-coding3 9 Figure 21 Structure of ITI sector.41 Figure 22 Structure of sync block of TIA .47 Figure 23 S
25、tructure of audio sector.50 Figure 24 Structure of sync blocks in audio sector 51 Figure 25 Structure of video sector.56 4 EN 62071-1:2006Figure 26 Structure of sync blocks in video sector 57 Figure 27 Structure of subcode sector 60 Figure 28 Structure of sync blocks in subcode sector61 Figure 29 Sa
26、mple to audio data bytes conversion .64 Figure 30 Arrangement of AAUX packs in audio auxiliary data 65 Figure 31 Data and inner parity of a data sync block .69 Figure 32 Data and outer parity of a data sync block for audio sector70 Figure 33 Relation between the compressed macro block number and the
27、 data-sync block 71 Figure 34 Arrangement.72 Figure 35 Data and outer parity of a data sync block for video sector 76 Figure 36 Arrangement of subcode data .77 Figure 37 Bit assignment for subcode data and parity .80 Figure 38 Recorded control code waveform timing (525/60 system) 81 Figure 39 Record
28、ed control code waveform timing (625/50 system) 81 Figure B.1 Typical track pattern during insert editing for 25 Mb/s format83 Figure B.2 Typical track pattern during insert editing for 50 Mb/s format84 Figure C.1 Correction factors (actual tape speed, tension)86 Figure C.2 Track location error plot
29、 for 25 Mb/s format (example).87 Figure C.3 Track location error plot for 50 Mb/s format (example).87 Figure C.4 Cross-tape measurement technique 87 Figure D.1 Frequency characteristics of F0track 88 Figure F.1 Block diagram of D-7 recorder .90 Table 1 Record locations and dimensions (525/60 system
30、of 25 Mb/s format) .15 Table 2 Record locations and dimensions (625/50 system of 25 Mb/s format) .16 Table 3 Record locations and dimensions (525/60 system of 50 Mb/s format) .17 Table 4 Record locations and dimensions (625/50 system of 50 Mb/s format) .18 Table 5 Parameters for a possible scanner d
31、esign of 25 Mb/s format22 Table 6 Parameters for a possible scanner design of 50 Mb/s format22 Table 7 Frames and servo information (525/60 system of 25 Mb/s format) 29 Table 8 Frames and servo information (625/50 system of 25 Mb/s format) 30 Table 9 A frame and servo information (525/60 system of 5
32、0 Mb/s format)31 Table 10 A frame and servo information (625/50 system of 50 Mb/s format)32 Table 11 Bit stream of ITI preamble for servo information F041 Table 12 Bit stream of ITI preamble for servo information F142Table 13 Bit stream of ITI preamble for servo information F243 Table 14 Bit stream
33、of SSA for servo information F0.44 Table 15 Bit stream of SSA for servo information F1.45 Table 16 Bit stream of SSA for servo information F2.46 Table 17 Application ID of track information47 Table 18 Pilot frame .47 Table 19 Bit stream of TIA for servo information F048 Table 20 Bit stream of TIA fo
34、r servo information F148 5 EN 62071-1:2006Table 21 Bit stream of TIA for servo information F248 Table 22 Bit stream of ITI post-amble for servo information F0.49 Table 23 Bit stream of ITI post-amble for servo information F1.49 Table 24 Bit stream of ITI post-amble for servo information F2.49 Table
35、25 ID0 in audio sector.52 Table 26 Audio application ID .52 Table 27 Track pair number for 25 Mb/s format 52 Table 28 Track pair number for 50 Mb/s format 53 Table 29 Bit assignment of ID codewords .54 Table 30 ID data in video sector .58 Table 31 Video application ID .59 Table 32 ID data in subcode
36、 sector 61 Table 33 Subcode application ID 62 Table 34 AAUX data.66 Table 35 Mapping of AAUX source pack.66 Table 36 Mapping of AAUX source control pack67 Table 37 VAUX data.73 Table 38 Mapping of VAUX source pack.73 Table 39 Mapping of VAUX source control pack74 Table 40 Mapping of subcode pack 77
37、Table 41 Mapping of time code pack 78 Table 42 Mapping of a binary group pack .79 Table C.1 Nomenclature and calculation of track location error .86 Table E.1 Tape length and recording time.89 6 EN 62071-1:2006HELICAL-SCAN COMPRESSED DIGITAL VIDEO CASSETTE SYSTEM USING 6,35 mm MAGNETIC TAPE FORMAT D
38、-7 Part 1: VTR specifications 1 Scope This part of IEC 62071 specifies the content, format and recording method of the data blocks containing video, audio, and associated data which form the helical records on 6,35 mm tape contained in cassettes as specified in SMPTE 307M. In addition, this standard
39、 specifies the content, format, and recording method for longitudinal cue and control tracks. One video channel and two independent audio channels are recorded in the digital format for 25 Mb/s VTRs and one video channel and four independent audio channels for 50 Mb/s VTRs. Each of these channels is
40、 designed to be capable of independent editing. The video channel records and reproduces a component television signal in the 525-line system with a frame frequency of 29,97 Hz (hereinafter referred to as the 525/60 system) and the 625-line system with a frame frequency of 25,00 Hz (hereinafter refe
41、rred to as the 625/50 system). Prior to recording, the digital signal is be compressed to a DV-based 25 Mb/s bit stream with 4:1:1 sampling or a DV-based 50 Mb/s bit stream with 4:2:2 sampling. The standard includes the process required to decode the DV-based 25 Mb/s bit stream and 50 Mb/s bit strea
42、m into output video, audio, and data. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendment
43、s) applies. AES3:2003, AES Recommended Practice for Digital Audio Engineering Serial transmission format for two-channel linearly represented digital audio data SMPTE 12M: 1999, Television, Audio and Film Time and Control Code SMPTE 259M: 1997, Television 10-Bit 4:2:2 Component and 4fsc NTSC Composi
44、te Digital Signals Serial Digital Interface 3 Abbreviations and acronyms AAUX Audio auxiliary data AP1 Audio application ID AP2 Video application ID AP3 Subcode application ID APT Track application ID 7 EN 62071-1:2006Arb Arbitrary AS AAUX source pack ASC AAUX source control pack B/W Black and white
45、 flag CGMS Copy generation management system DBN DIF block number DCT Discrete cosine transform DIF Digital interface DSF DIF sequence flag ECC Error correction code EFC Emphasis channel flag EOB End of block ID Identification IDP ID parity ITI Insert and track information LF Locked mode flag PF Pil
46、ot frame QNO Quantization number QU Quantization Res Reserved for future use SMP Sampling frequency SSA Start sync area SSYB Subcode sync block number STA Status of the compressed macro block Syb Sync block number TF Transmitting flag TIA Track information area Trp Track pair number VAUX Video auxil
47、iary data VLC Variable length coding VS VAUX source pack VSC VAUX source control pack VSM Vibrating sample magnetometer 4 Environment and test conditions 4.1 Environment Tests and measurements made on the system to check the requirements of this standard shall be carried out under the following cond
48、itions: Temperature: 20 C 1 C Relative humidity: (50 2) % Barometric pressure: from 86 kPa to 106 kPa Tape conditioning: not less than 24 h Centre tape tension: 0,09 N 0,02 N (see Annex A) 8 EN 62071-1:20064.2 Reference tape A blank tape for reference recordings shall be available from the format holder or approved source. 4.3 Calibration tapes The calibration tapes meeting the requirements of 4.3.1, 4.3.2, and Clause 5 shall be made available from manufacturers who produce digital television tape recorders and players in accordance with this standard. 4.3.1 Record loca
